Reenforced pipe joint



Patented Sept. 22, A1931 UNITED STATES PATENT oFFlcE i GEORGREICHENBECHEB, OF MULHEIM-BLUHB, GERMANY, ASSIGNOR TO THE FRH-.VEREINIGTE STAHLWERKE AKTIENGESELLSCHAFT, F DUSSELDORF, GERMANYnEENFoRcEn PIPE .ToINr Application led December 21, 1928, Serial No.327,617, and in Germany March 27, 1928.

The present invention relates to reenforced pipe joints and has forits'o'bject to provide a particularly advantageous pipe' joint in whichtlie end of the pipe has been reenforced 'f '5I to about three times itsoriginal wall thickness by folding it back upon itself several,-

reenforced byK folding them back severaltimes are being anged out so asto form a ring flange that either directly or in connection with a looseflange is capable of receiving the flange securing-means. It will beVreadily understood that without departing from the spirit of the presentinvention the 'reenforcing layers may be folded either on 'the inner oron the outer wall `of thel pipe.

Such reenforced ange joints are capable of offering particularly greatresistance and may be employed to best advantage in all cases where aparticularly great durability and strength are a prime desideratum. Fromthe foregoing it will be clear that the principle of the invention maybe employed in the manufacture of a variety of shapes of flangedsockets.

Another feature of the present' invention consists in that the backportion r of a layer 40 may be welded in any suitable manner toeitherthe inner or the outer wall of the pipe, which means a furtherconsiderable strengthening of the joint. j j

1n order that the invention may be better eriA understood various modesof carrying the invention into eiect are shown in the annexed drawings,by way of example.

- Inthe drawings: l

Fig. 1 shows a ring fiange joint the reinforcing layers of which havebeen folded ange formed integrally by bending said circumferentiallayers together in such a fashion back on the outer wall of the pipe.The integral rin flange, thus formed, provides the `necessary earin`surface for a loose fiange.

Fig.` 2 shows t e back portion of the layer illustrated in'Fig. 1 weldedto the wall of the pipe. A

' Fig. 3 shows thesame joint as illustra-ted in Fig. 1 exceptthat thereinforcement has been brought about by foldin the end of the pipe backon the inner wall og the pipe.

Fig. 4 shows the reinforcement as illustrated in Fig. 3 welded to theinner wall of the pipe. 4

Fig. 5 shows a flange joint in which the end of the pipe has beenreenforced by. folding it back on the inner wall of the pipe. The interal ange thus formed is capable of receiving the flange bolts.

In the drawings b designates the ring arge reenforced by the foldin`operation, r l e back portion of the'tilte part of the ipe which iswelded to the inner or outer wa of the pipe respectively, and f theloose flange.

Having thus described the invention what I claim as new and desire tosecure by Letters Patent is: s

1. A reenforced flanged pipe end having its wall folded back and forthupon itself several times to form circumferential la ers and its thatthe juncture between said flangefand the. cylindrical pipe wall has athickness equal to j the sum of the thickness of said layers.

2. A -reenforced pipe joint having the end of the pipe wall folded backand forth upon itself several times to form circumferential of the pipewall outwardly folded ack and forth upon itself twice to form threecircumlferential layers, an integral flange formed by bending said threecircumferential layers togetlier in such a fashion that the juncturebetweenfsaid ange and the cylindrical 'pipe wall has a triple thickness,a weld on the pe-v riphery of the cylindrical pipe Wall joinln andfit-ting together said wall and the secon elbow, or bent end opposite tosaid flange, i

adjacent to said wall and ange securing means engaging said integralBange.

4. A reenforced pipe joint havin the lend of the pipe wall inwardlyfolded ackA andV 'forth upon itselftwice to form three circum-`ferential layers, and integral flange formed by bending said threecircumferential layers f together in such a fashion 'that the juncturebetween said ange and the cylindrical pipe wall has a triple thickness,a weld on the interior surface of the cylindrical pipe wall `joining andtting together said wall and thekl second elbow, or bent end opposite tosaid flange, adjacent to said wall and flan e se-v curing means engagingsaid integral ange,-

In testimony whereof I aix my signature.

GEORG REICHENBECHER.

